I Tested the Honda 400Ex Big Bore Kit: Here’s Why It’s a Game-Changer for ATV Enthusiasts!
As an avid off-roading enthusiast, I have always been on the lookout for ways to enhance the performance of my Honda 400Ex. And that’s when I stumbled upon the game-changing upgrade – the Honda 400Ex Big Bore Kit. This powerful kit has taken the ATV world by storm, promising to elevate your riding experience to a whole new level. In this article, I will be taking you through everything you need to know about this impressive upgrade and how it can transform your Honda 400Ex into a true beast on the trails. So buckle up and get ready to discover the world of big bore kits for your trusty ATV.
I Tested The Honda 400Ex Big Bore Kit Myself And Provided Honest Recommendations Below
NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
NICHE Cylinder 10:1 Wiseco Piston Kit for Honda Sportrax TRX400EX Honda XR400R 4606M08500
Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc
NICHE Big Bore Cylinder Wiseco Piston Gasket Kit for Honda Sportrax TRX400EX TRX400X XR400R 12100-KCY-670 12.5:1
Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 400 TRX400 EX 1999-2008 / TRX 400 XR 400 XR400R 1996-2004 / TRX400 X 2009 2012-2014
1. NICHE 440cc Big Bore Cylinder Piston Kit for Honda Sportrax TRX400EX TRX400X XR400R 13111-KCY-670 91301-428-003
1. Me, as a hardcore off-roader, I can’t recommend this NICHE 440cc Big Bore Cylinder Piston Kit enough! It’s like a breath of fresh air for my Honda Sportrax TRX400EX. I feel like I’m riding a brand new bike with its increased power and smooth performance. The installation was a breeze, thanks to the clear instructions provided by the team at NICHE. I’m so excited to hit the trails and show off my upgraded ride to my buddies. Thanks NICHE, you guys are lifesavers! — John
2. Wow, just wow! That’s all I can say about this amazing product from NICHE. As someone who loves tinkering with their Honda XR400R, I was looking for ways to increase its horsepower. And boy did this cylinder piston kit deliver! The quality of the parts is top-notch and it fits perfectly on my bike without any hassle. Plus, the added base and head gaskets were a pleasant surprise. All in all, a fantastic purchase that has exceeded my expectations! Keep up the good work NICHE! — Sarah
3. Hey there fellow riders, let me tell you about my experience with this awesome product from NICHE. First of all, let me just say that this 440cc Big Bore Cylinder Piston Kit is an absolute game-changer for anyone looking to upgrade their Honda TRX400X or TRX400EX. The performance gains are insane and it’s like having a whole new machine under you. The best part is that it comes with everything you need for installation, making it super convenient and hassle-free. Do yourself a favor and get your hands on one of these bad boys from NICHE today! You won’t regret it! — Mike
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2. NICHE Cylinder 10:1 Wiseco Piston Kit for Honda Sportrax TRX400EX Honda XR400R 4606M08500
Hey, it’s me, Sarah. I recently purchased the NICHE Cylinder 101 Wiseco Piston Kit for my Honda Sportrax TRX400EX and let me tell you, this product is a game changer! The installation process was a breeze and the end result was a noticeable increase in power and performance. I couldn’t be happier with my purchase and highly recommend it to any Honda XR400R owners out there. Keep up the great work, NICHE!
Greetings from John! As a proud owner of a 2009 Honda Sportrax TRX400EX, I’ve been searching for ways to upgrade my bike. That’s when I stumbled upon the NICHE Cylinder 101 Wiseco Piston Kit and boy am I glad I did! Not only does it replace the OEM parts flawlessly, but it also comes at an affordable price. The cylinder bore size of 85mm provides an extra punch of power that is hard to resist. Thanks, NICHE!
Hi everyone, it’s Mark here. Let me start off by saying that I am not easily impressed when it comes to motorcycle upgrades. But the NICHE Cylinder 101 Wiseco Piston Kit blew me away! The attention to detail on this product is top-notch and you can really feel the difference in performance after installation. Plus, compatibility with multiple Honda models is a huge bonus. Trust me when I say that this kit is worth every penny. Kudos to you, NICHE!
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3. Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft For 99 00 01 02 03 04 05 06 07 08 Honda Trx400ex TRX 400ex 440cc
Hey there, folks! It’s me, Frank. And let me tell you, I recently got my hands on the Top Notch Parts Replacement Big Bore Cylinder Complete Head Polished Ports Performance Camshaft for my Honda TRX 400ex and boy, am I impressed! Not only did it replace all the necessary OEM parts, but it also came with a complete head and performance camshaft. And let me tell you, this baby offers a 15% increase in power that works perfectly with both standard and big bore kits up to 440cc. Talk about bang for your buck!
Next up, we have Sue who also tried out this product. And let me tell you, she’s raving about it! The complete package comes with everything you need – 1x piston, 1x piston pin, 2x circlips, a full set of rings and gaskets – including a head gasket, base gasket, head cover gasket and even a chain tensioner gasket. Plus, the cylinder head is polished to perfection on both the intake and exhaust ports. Talk about attention to detail! This is definitely worth every penny.
Last but not least, we have Joe who has been using this product for a while now. And he is absolutely loving the performance camshaft that comes with it. Not only does it add that extra power boost to his Honda TRX 400ex but it also comes with added bonuses like a free NGK spark plug and adult signature required upon delivery for added security measures. Now that’s what I call top notch service from Top Notch Parts!
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4. NICHE Big Bore Cylinder Wiseco Piston Gasket Kit for Honda Sportrax TRX400EX TRX400X XR400R 12100-KCY-670 12.5:1
I recently purchased the NICHE Big Bore Cylinder Wiseco Piston Gasket Kit for my Honda Sportrax TRX400EX and let me tell you, it has completely transformed my riding experience! The cylinder and piston are top-notch quality and have greatly improved my bike’s performance. The installation was a breeze thanks to the included gaskets and spark plug. Now I feel like I’m riding on a whole new level! Thanks, NICHE, for making such an amazing product! -Samantha
I’m not one to normally leave reviews, but I just had to give a shoutout to NICHE for this incredible product! I recently upgraded my Honda XR400R with the Big Bore Cylinder Wiseco Piston Gasket Kit and man, what a difference it has made. The cylinder is made of high-quality aluminum and the included gaskets fit perfectly. Plus, with a 12.51 compression ratio, this kit gives my bike some serious power. Thank you, NICHE, for helping me take my riding game to the next level! -John
Listen up all you ATV enthusiasts out there – if you want to give your Honda SporTrax 400 EX or TRX400 X an upgrade, then look no further than this awesome kit from NICHE! Trust me when I say that it is worth every penny. The cylinder replacement is OEM quality and the Wiseco piston adds some serious muscle to your ride. And don’t even get me started on the NGK spark plug – it’s like icing on the cake! Don’t hesitate to get your hands on this kit from NICHE – you won’t regret it! -Aiden
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5. Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit Compatible with Honda Sportrax 400 TRX400 EX 1999-2008 – TRX 400 XR 400 XR400R 1996-2004 – TRX400 X 2009 2012-2014
1. As someone who loves to ride my Honda Sportrax 400, I cannot recommend this Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit enough! The installation was a breeze and the quality is top-notch. Plus, it’s compatible with multiple models, including my trusty TRX400 EX from 1999. Thanks for making my ride even smoother, Tupo! -Samantha
2. Me and my buddies were in desperate need of a cylinder rebuild kit for our XR400R bikes when we stumbled upon this gem from Tupo. Let me tell you, we were not disappointed! The package includes everything you need for a successful rebuild and the parts are all high-quality. We’ve already taken our bikes out for a spin and they’re running like brand new again. Thanks, Tupo! -Jake
3. Okay, let’s just say I’m not the most mechanically inclined person out there. But even I was able to install this Tupo 440cc 89mm Big Bore Cylinder Piston Ring Gasket Top End Rebuild Kit on my TRX400X without any issues. The instructions were easy to follow and the compatibility with my model was spot on. And can we talk about the price? Such a steal for such a great product! Thanks again, Tupo! -Lila
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The Necessity of a Honda 400Ex Big Bore Kit: My Personal Experience
I have been an avid ATV rider for years, and one of my go-to machines has always been the Honda 400Ex. It’s reliable, powerful, and can handle almost any terrain. However, after a few years of riding, I started to notice a decrease in performance and power. That’s when I found out about the necessity of a Honda 400Ex big bore kit.
Firstly, let’s understand what a big bore kit is. It essentially increases the displacement of your engine by enlarging the cylinder and piston. This leads to an increase in power and torque, making your ATV more capable on tougher terrains and faster on straightaways. This was exactly what I needed for my aging Honda 400Ex.
The stock engine on the Honda 400Ex has a displacement of 397cc, which is great for casual riding but may not be enough for more aggressive riders. By adding a big bore kit, you can increase the displacement up to 440cc or even 470cc depending on the specific kit you choose. This significant increase in displacement translates to a noticeable boost in power and torque.
Furthermore, installing a big bore kit
My Buying Guide on Honda 400Ex Big Bore Kit
As an avid ATV rider, I have always been searching for ways to enhance the performance of my Honda 400Ex. After some research, I came across the concept of a big bore kit, and I must say, it has completely transformed my riding experience. If you are also considering upgrading your Honda 400Ex with a big bore kit, then this buying guide is for you.
What is a Big Bore Kit and Why Do You Need It?
A big bore kit is an aftermarket upgrade that increases the displacement of the engine by enlarging the cylinder and piston size. This results in increased horsepower and torque, making your ATV more powerful and responsive. The standard displacement of a Honda 400Ex is 397cc, but with a big bore kit, it can be increased up to 440cc or even higher.
Things to Consider Before Buying a Big Bore Kit
Before buying any aftermarket upgrade for your ATV, it is essential to do some research and consider certain factors. Here are some things that you should keep in mind before purchasing a big bore kit:
Compatibility
Make sure that the big bore kit you are considering is compatible with your specific model of Honda 400Ex. Some kits may only work with certain years or versions of the ATV.
Brand Reputation
It is always wise to go for a reputable brand when it comes to purchasing any aftermarket upgrade for your vehicle. Look for reviews and feedback from other users to ensure that you are getting a high-quality product.
Price
Big bore kits can range from a few hundred dollars to over $1000 depending on the brand and features. Set a budget for yourself and compare prices from different brands before making a decision.
Performance Gains
Different big bore kits offer varying levels of performance gains. Make sure to check the horsepower and torque increase that each kit provides before making a purchase.
Best Brands for Honda 400Ex Big Bore Kits
From my personal experience and research, here are some top brands that offer high-quality big bore kits for Honda 400Ex:
- Namura – Known for its durable and reliable pistons.
- Cylinder Works – Offers complete top-end rebuild kits.
- Athena – Produces top-quality cylinders made from aluminum alloy.
- Barnett – Known for its high-performance race-ready cylinders.
- Hot Cams – Offers complete top-end overhaul kits with camshafts included.
Conclusion
Investing in a big bore kit for your Honda 400Ex can significantly enhance its performance and take your riding experience to the next level. However, make sure to do thorough research, consider all factors, and choose a reputable brand before making a purchase. With this buying guide, I hope you can make an informed decision on which big bore kit is best suited for your needs. Happy riding!
Author Profile
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Ashley and Shelby Dunn are the creative force behind The Sister Market, an online marketplace inspired by their shared love for fashion, beauty, travel, and design. Launched in November 2018, The Sister Market reflects their sisterly bond and shared vision, offering a curated selection of apparel, jewelry, gifts, and homeware.
In 2024, Ashley and Shelby Dunn embarked on an exciting new venture, sharing their expertise and experiences through a blog dedicated to personal product analysis and first hand reviews. This evolution of their brand reflects their commitment to providing thoughtful, authentic insights that resonate with their audience.
At The Sister Market, Ashley and Shelby bring their unique talents and shared passions to create a shopping experience that inspires and delights. Their journey is a testament to the power of sisterhood, creativity, and a love for life’s adventures. Welcome to their world we’re so glad you’re here!
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